Practice 1000 Mechanical Behaviour Testing Materials Multiple Choice Questions with Answers Quiz-1

Q.1.

With an increase in strain rate, ductility ______ and tensile strength _____

a) Decreases, decreases
b) Decreases, increases
c) Increases, increases
d) Increases, decreases

Explanation

Q.2.

Largest size flaw can be determined using which of the following test?

a) Shore test
b) Brinell test
c) Leeb test
d) NDT

Explanation

Q.3.

Yield and flow strength at lower plastic strain is more dependent on _____ than ______

a) Strain rate, temperature
b) Temperature, tensile strength
c) Tensile strength, strain rate
d) Strain rate, tensile strength

Explanation

Q.4.

R-curve behaviour is a material related property.

a) False
b) True

Explanation

Q.5.

Which of the following machine is used to measure compressive strength?

a) Universal testing machine
b) Impact testing machine
c) Fatigue testing machine
d) Erichsen machine

Explanation

Q.6.

Which of the following instrument is used to measure formability?

a) Universal testing machine
b) Impact testing machine
c) Fatigue testing machine
d) Erichsen machine

Explanation

Q.7.

Which of the following device is used to measure hardness in Mohs?

a) Rockwell tester
b) Sclerometer
c) Universal testing machine
d) Gyro meter

Q.8.

What is the cross-section of standard specimen for impact testing?

a) 10mm × 10mm
b) 20mm × 60mm
c) 10mm × 40mm
d) 45mm × 60mm

Explanation

Q.9.

Which of the following test is more preferred for testing hardness of electroplated surface?

a) Microhardness test
b) Dynamic hardness test
c) Macro hardness test
d) Scratch hardness test

Explanation

Q.10.

Which of the following is a drawback of ultrasonic testing?

a) Shape restriction
b) Low depth
c) Higher errors
d) High sensitivity

Q.11.

Is ultrasonic testing is destructive testing?

a) False
b) True

Explanation

Q.12.

Which of the following factor affects ductile-brittle transition behavior the most?

a) Triaxiality
b) Notching
c) Temperature
d) Strain rate

Explanation

Q.13.

Which of the following material shows a gradual rising R-curve with failure governed by R-curve behaviour?

a) Low toughness and strength
b) High toughness and strength
c) Low toughness / strength
d) High toughness / low strength

Explanation

Q.14.

The slope of the stress-strain curve in the plastic range is _____

a) Bauschinger effect
b) Resolved shear stress
c) True strain
d) Rate of strain hardening

Explanation

Q.15.

At strain rates _____ behaviour of the material is characterized by creep.

a) High, 104 per second
b) High, 10-4 per second
c) Low, 104 per second
d) Low, 10-4 per second

Explanation

Q.16.

Radiography don’t give ________

a) Pores in weldment
b) Blow holes in casting
c) Hardness
d) Thickness of material

Explanation

Q.17.

ECI is only used for ferromagnetic materials.

a) False
b) True

Explanation

Q.18.

Standard penetration depth varies from material to material.

a) False
b) True

Explanation

Q.19.

Which of the following material can’t be tested by MPI?

a) Mg
b) Fe
c) Co
d) Ni

Explanation

Q.20.

What is the Curie point for most of the ferrous magnetic materials?

a) 460˚C
b) 760˚C
c) 240˚C
d) 557˚C

Explanation

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